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Pohle, Marco; Werban, Ulrike (2019): Near surface geophysical data (Electromagnetic Induction - EMI, Gamma-ray spectrometry), August 2017), Selbitz (Elbe), Germany [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.910272, Supplement to: Rentschler, Tobias; Werban, Ulrike; Ahner, Mario; Behrens, Thorsten; Gries, Phillipp; Scholten, Thomas; Teuber, Sandra; Schmidt, Karsten (2020): 3D mapping of soil organic carbon content and soil moisture with multiple geophysical sensors and machine learning. Vadose Zone Journal, 19(1), https://doi.org/10.1002/vzj2.20062

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Published: 2019-12-19 • DOI registered: 2020-02-11

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Abstract:
The data set was used to predict soil organic carbon and soil moisture in the vertical as well as horizontal domain, i.e. volumetrically, by using a weighted conditioned Latin Hypercube Sampling design for selecting the calibration samples and the geophysical covariates derived from electromagnetic induction (EMI) and a gamma-ray spectrometer with different intercoil spacings and, thus, different penetration depths and footprints of the signal. The study site is an agricultural field of 58 ha about 70 km north of Leipzig, Saxony-Anhalt, Germany. Present soil types are Gleysols and Gleyic Cambisols consisting of alluvial loam (loam and clay)over Holocene sediments of fluvial sand (LAGB, 2014).
The geophysical measurements were recorded with three EMI sensors (EM38-DD, Geonics Limited, ON, CA; CMD-Explorer and CMD-Mini-Explorer, both GF Instruments, CZ) and a gamma-ray spectrometer (GS CAR, GF Instruments, CZ) in August 2016. EMI sensors measure the apparent electric conductivity (ECa in mSm-1). All EMI sensors captured 5 records s-1 in any dipole orientation. The gamma-ray spectrometer is equipped with a 4l NaI(Tl)-crystal and automatic peak-stabilization to measure the concentration of potassium (40K), uranium (238U) and thorium (232Th). The device has 512 channels with an energy range from 100 keV to 3 MeV. Measurements were captured every 5 seconds. 40K, 238U and 232Th were measured as counts per second. The concentration of 40K (in %) and 238U and 232Th (both in ppm) was calculated corresponding to the decay rate at specific energy levels. The concentration of 40K, 238U and 232Th was used to calculate the dose rate (nGyh 1; IAEA, 2003).
For determination of soil organic carbon, the samples were dried at 40 °C for 24 h, sieved (<2 mm), ground and root fragments were removed. Total carbon was determined with dry combustion using an ELTRA CHS-580A Helios analyser (ELTRA GmbH, GER). Soil moisture was measured gravimetrically with drying at 90 °C for 24 h.
Keyword(s):
apparent electrical conductivity; digital soil mapping; Dose rate; electromagnetic induction; Gamma-ray spectrometry; Near surface geophysics; Potassium; Thorium; Uranium
Coverage:
Median Latitude: 51.828903 * Median Longitude: 12.532484 * South-bound Latitude: 51.824880 * West-bound Longitude: 12.525760 * North-bound Latitude: 51.833410 * East-bound Longitude: 12.539040
Date/Time Start: 2016-08-16T00:00:00 * Date/Time End: 2016-08-17T00:00:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
19 datasets

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Datasets listed in this publication series

  1. Pohle, M; Werban, U (2019): Electromagnetic induction of horizontally oriented dipole from CMD Explorer (148 cm spacing) analysed in Selbitz, Saxony-Anhalt (Germany). https://doi.org/10.1594/PANGAEA.910102
  2. Pohle, M; Werban, U (2019): Electromagnetic induction of horizontally oriented dipole from CMD Explorer (282 cm spacing) analysed in Selbitz, Saxony-Anhalt (Germany). https://doi.org/10.1594/PANGAEA.910116
  3. Pohle, M; Werban, U (2019): Electromagnetic induction of horizontally oriented dipole from CMD Explorer (449 cm spacing) analysed in Selbitz, Saxony-Anhalt (Germany). https://doi.org/10.1594/PANGAEA.910119
  4. Pohle, M; Werban, U (2019): Electromagnetic induction of vertically oriented dipole from CMD Explorer (148 cm spacing) analysed in Selbitz, Saxony-Anhalt (Germany). https://doi.org/10.1594/PANGAEA.910124
  5. Pohle, M; Werban, U (2019): Electromagnetic induction of vertically oriented dipole from CMD Explorer (282 cm spacing) analysed in Selbitz, Saxony-Anhalt (Germany). https://doi.org/10.1594/PANGAEA.910128
  6. Pohle, M; Werban, U (2019): Electromagnetic induction of vertically oriented dipole from CMD Explorer (449 cm spacing) analysed in Selbitz, Saxony-Anhalt (Germany). https://doi.org/10.1594/PANGAEA.910132
  7. Pohle, M; Werban, U (2019): Electromagnetic induction of horizontally oriented dipole from CMD Mini Explorer (32 cm spacing) analysed in Selbitz, Saxony-Anhalt (Germany). https://doi.org/10.1594/PANGAEA.910134
  8. Pohle, M; Werban, U (2019): Electromagnetic induction of horizontally oriented dipole from CMD Mini Explorer (71 cm spacing) analysed in Selbitz, Saxony-Anhalt (Germany). https://doi.org/10.1594/PANGAEA.910135
  9. Pohle, M; Werban, U (2019): Electromagnetic induction of horizontally oriented dipole from CMD Mini Explorer (118 cm spacing) analysed in Selbitz, Saxony-Anhalt (Germany). https://doi.org/10.1594/PANGAEA.910136
  10. Pohle, M; Werban, U (2019): Electromagnetic induction of vertically oriented dipole from CMD Mini Explorer (32 cm spacing) analysed in Selbitz, Saxony-Anhalt (Germany). https://doi.org/10.1594/PANGAEA.910138
  11. Pohle, M; Werban, U (2019): Electromagnetic induction of vertically oriented dipole from CMD Mini Explorer (71 cm spacing) analysed in Selbitz, Saxony-Anhalt (Germany). https://doi.org/10.1594/PANGAEA.910147
  12. Pohle, M; Werban, U (2019): Electromagnetic induction of vertically oriented dipole from CMD Mini Explorer (118 cm spacing) analysed in Selbitz, Saxony-Anhalt. https://doi.org/10.1594/PANGAEA.910154
  13. Pohle, M; Werban, U (2019): Electromagnetic induction of horizontally oriented dipole from EM38DD (100 cm spacing) analysed in Selbitz, Saxony-Anhalt. https://doi.org/10.1594/PANGAEA.910155
  14. Pohle, M; Werban, U (2019): Electromagnetic induction of vertically oriented dipole from EM38DD (100 cm spacing) analysed in Selbitz, Saxony-Anhalt. https://doi.org/10.1594/PANGAEA.910156
  15. Pohle, M; Werban, U (2019): Gamma-ray spectrometry analysis of dose rate from Selbitz, Saxony-Anhalt (Germany). https://doi.org/10.1594/PANGAEA.910271
  16. Pohle, M; Werban, U (2019): Gamma-ray spectrometry analysis of Potassium from Selbitz, Saxony-Anhalt (Germany). https://doi.org/10.1594/PANGAEA.910268
  17. Pohle, M; Werban, U (2019): Gamma-ray spectrometry analysis of Thorium from Selbitz, Saxony-Anhalt (Germany). https://doi.org/10.1594/PANGAEA.910269
  18. Pohle, M; Werban, U (2019): Gamma-ray spectrometry analysis of Uranium from Selbitz, Saxony-Anhalt (Germany). https://doi.org/10.1594/PANGAEA.910270
  19. Pohle, M; Werban, U (2019): Soil sample anaysis from Elbe estuary in Selbitz, Saxony-Anhalt (Germany). https://doi.org/10.1594/PANGAEA.910159